NASA catches the 1-day life of Tropical Cyclone Neil

Tropical Cyclone Neil had a short life in the Southwestern Pacific Ocean. It developed on February 9 and dissipated on February 10. NASA's Aqua satellite captured an image of the storm that developed even while battling wind shear.

Neil developed around 4 p.m. EDT (2100 UTC) on February 9 about 302 nautical miles west-southwest of Niue with maximum sustained winds near 35 knots (40 mph/65 kph). Niue is a small island nation in the South Pacific Ocean. According to the official website of Niue tourism, Niue is one of the smallest countries and one of the largest raised coral atolls on Earth.

On Feb. 10, Tropical cyclone no longer qualified as a tropical cyclone. At 4 a.m. EDT (0900 UTC) Neil was dissipating near 24.0 degrees south latitude and 173.9 east longitude, about 369 miles southwest of Niue. Neil's maximum sustained winds had already dropped to 30 knots (34.5 mph/55.5 kph) and continued weakening.

A visible image of short-lived Tropical Cyclone Neil was taken from NASA's Aqua satellite on Feb. 9. The image showed that northwesterly vertical wind shear was affecting the storm and pushing the bulk of clouds to the southeastern quadrant.

In general, wind shear is a measure of how the speed and direction of winds change with altitude. In order to understand how it affects a tropical cyclone or hurricane, think of a tropical cyclone as a vertical rotating cylinder. The different levels of rotating winds in the center of Tropical cyclones need to be stacked on top each other for the storm to strengthen. If there are outside winds pushing against the cylinder near the top, it affects the balance of the entire cylinder and that's what happens when vertical wind shear pushes against a storm. It pushes the center and weakens (or wobbles) the rotation of the entire cylinder (storm).

On Feb. 9, the Joint Typhoon Warning Center noted that the final warning was issued on Neil .

NASA sees Tropical Cyclone Ernie intensifyThe storm formerly known as tropical cyclone 15S, now called Tropical Cyclone Ernie continued to strengthen as NASA's Aqua satellite captured a visible image that showed the storm developed an eye.

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